Electrical issue

[dmag310]

Im hoping one of you electrical savvy dudes can help me out. So i was doing this mod. Factory Fog Lamp Re-Wire Mod - 3rd Gen 4Runner - YotaTech Forums so I could run some led lights off the factory fog switch. Well i got it all wired up and power is working fine, but it has created its own problem. Now my fuel gauge is all kinds of messed up. It drops to empty and is flashing even though its a fuel tank. Any ideas on where to check??:sobbing:

 

[dmag310]

I also undid everything and reverted it back to how it was, but the issue is still there. Im Lost

 

[dmag310]

Bump,

i tried re calibrating the gauge with the odo button but no luck still.

 

[TheDurk]

Probably a ground issue. Check any grounds you messed with or might have disturbed while you were working.